Near room-temperature thermocatalysis: a promising avenue for the degradation of polyethylene using NiCoMnO4 powders

文献类型： 外文期刊

第一作者： Li, Ke

作者： Li, Ke;Wu, Pei;Zhang, Zhenming;Zhang, Yu;Li, Ke;Wu, Pei;Zhang, Zhenming;Zhao, Juan

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期刊名称：RSC ADVANCES （ 影响因子：3.361； 五年影响因子：3.39 ）

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收录情况： SCI

摘要： Polyethylene has been widely used around the world but its degradation is always restricted to being light- or microorganism-assisted. Here, a new irradiation-free and near room-temperature thermocatalytic approach for low density polyethylene (LDPE) degradation is developed by employing NiCoMnO4 as thermocatalyst. LDPE/NiCoMnO4 composites were firstly manufactured by melt blending or physically mixing and then underwent thermal aging in ovens with temperatures ranging from 30 degrees C to 50 degrees C in darkness. NiCoMnO4 is proven to have outstanding thermocatalytic activity and can lead to distinct thermal degradation of composite films both in air and in water. The optimal NiCoMnO4 dosage in composite films is just 1 wt% and for this specific catalyst loaded composite film, its decomposition temperature and weight-average molecular weight reduced by 53.43 degrees C and 79.60% respectively, together with an increase of crystallinity by 5.5% after thermal aging in air at 50 degrees C for 90 days. In addition, a higher degradation degree could be achieved with a further increase of the thermal aging time.

分类号： O6

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